title: Novel Ag@TiO2 nanocomposite synthesized by electrochemically active biofilm for nonenzymatic hydrogen peroxide sensor.
abstract: A novel nonenzymatic sensor for H2O2 was developed based on an Ag@TiO2 nanocomposite synthesized using a simple and cost effective approach with an electrochemically active biofilm. The optical, structural, morphological and electrochemical properties of the as-prepared Ag@TiO2 nanocomposite were examined by UV-vis spectroscopy, X-ray diffraction, transmission electron microscopy and cyclic voltammetry (CV). The Ag@TiO2 nanocomposite was fabricated on a glassy carbon electrode (GCE) and their electrochemical performance was analyzed by CV, differential pulse voltammetry and electrochemical impedance spectroscopy. The Ag@TiO2 nanocomposite modified GCE (Ag@TiO2/GCE) displayed excellent performance towards H2O2 sensing at -0.73 V in the linear response range from 0.83 μM to 43.3 μM, within a detection limit and sensitivity of 0.83 μM and ~65.2328±0.01 μA μM(-1) cm(-2), respectively. In addition, Ag@TiO2/GCE exhibited good operational reproducibility and long term stability.
authors.affiliation: School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, South Korea.
authors.forename: Mohammad Mansoob
authors.initials: MM
authors.lastname: Khan
authors.forename: Sajid Ali
authors.initials: SA
authors.lastname: Ansari
authors.forename: Jintae
authors.initials: J
authors.lastname: Lee
authors.forename: Moo Hwan
authors.initials: MH
authors.lastname: Cho
mesh_terms: D002244:Carbon / Q000737:chemistry; D058266:Dielectric Spectroscopy; D055664:Electrochemical Techniques; D004566:Electrodes; D006861:Hydrogen Peroxide / Q000032:analysis*; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D012834:Silver / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: C009495:titanium dioxide; D012834:Silver; D002244:Carbon; D006861:Hydrogen Peroxide; D014025:Titanium
keywords: Ag@TiO(2) nanocomposites; Ag@TiO(2)/GCE; Differential pulse voltammetry; Glassy carbon electrode; Hydrogen peroxide sensor; Nonenzymatic sensor